Problems trying to test

I cloned the project and run the following steps:

```bash
npm i
npm test
```
and this is the result

```bash
> sbolgraph@0.47.0 test
> bash test.sh

📝 Summary
📊 Statistics
       0 succeeded
       0 failed
       0 succeeded but were different
```

What other steps do I need to do to run the tests?